Actually - the more I think about the question the more I realise that I don’t want an iPad to do laptop tasks - as a designer I want the interface connection that comes from Pencil + touch interface on my MacBook Pro...
This is the failure in vision of sidecar, of seeing windows from one device appear in the dock of another (mainly just Safari and Mail, practice), of cut/paste between devices.
Really you want to be able to casually use your iPad as a kind of input device to the Mac sometimes. Also to pick up a task you’re engaged in on one device and continue in another, back and forth. I started this comment on an iPad; as it has turned out to be more than one sentence I should be able to finish typing in the Mac (a much better experience), pressing “reply” on either device and continuing on.
To channnel Conways’s law: Apple’s flat yet strictly siloed corporate structure makes things like this almost impossible.
I spend so much of my personal time in my iPad that when I am doing personal research on my laptop, at least once a month I try to poke the screen with my finger (never happens at work, different context)
I’m still a little surprises as MBP having no touch interface. Another option would be if the touch pad and the touch bar were fused into one product, allowing a bit of pencil interaction